EAST LANSING (WWJ/AP) – Police at Michigan State University say the school’s emergency alert system sent out a false warning of someone firing shots on the East Lansing campus.

Sgt. Dan Munford told the Lansing State Journal that the error happened about 6 p.m. Tuesday when the area received a tornado warning.

READ MORE: What Is The Best Sunscreen For Me? Environmental Working Group Releases Annual Guide

He said the alert system mistakenly reported that there was an “active shooter” at Wilson Hall. In fact, there was no active shooter and the message was taken down immediately.

READ MORE: Parole Denied For Don Miller Who Killed 4 Women In Lansing In The 1970s

Police say about half the people on the alert system got the tornado warning alert and about half got the active shooter alert. Over 40,000 people are reportedly subscribed to the alert system.

Authorities say they’re working to fix the problem, which was blamed on a “computer glitch.”

MORE NEWS: Michigan Court Seeks More From Whitmer About Abortion Ban Challenge

TM and © Copyright 2013 CBS Radio Inc. and its relevant subsidiaries. CBS RADIO and EYE Logo TM and Copyright 2013 CBS Broadcasting Inc. Used under license. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed. The Associated Press contributed to this report.